CN112140551B - 3DP powder printing method, device and system and storage medium - Google Patents

3DP powder printing method, device and system and storage medium Download PDF

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Publication number
CN112140551B
CN112140551B CN201910568261.6A CN201910568261A CN112140551B CN 112140551 B CN112140551 B CN 112140551B CN 201910568261 A CN201910568261 A CN 201910568261A CN 112140551 B CN112140551 B CN 112140551B
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layer
printed
powder
printing
image
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CN112140551A (en
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郑栋娥
杜银学
刘轶
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Kocel Intelligent Machinery Ltd
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Kocel Intelligent Foundry Industry Innovation Center Co Ltd
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Priority to CN201910568261.6A priority Critical patent/CN112140551B/en
Priority to KR1020217041505A priority patent/KR102569187B1/en
Priority to JP2021527040A priority patent/JP7161834B2/en
Priority to PCT/CN2020/097337 priority patent/WO2020259425A1/en
Priority to EP20832610.8A priority patent/EP3991951B1/en
Publication of CN112140551A publication Critical patent/CN112140551A/en
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Publication of CN112140551B publication Critical patent/CN112140551B/en
Priority to US17/555,481 priority patent/US11919247B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205—Means for applying layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention discloses a 3DP powder printing method, a device and a system and a computer readable storage medium, wherein the method comprises the steps of analyzing printing images of all layers corresponding to a component to be printed in advance, determining a target printing image and adding a preset mark to the target printing image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape-pushing displacement of the previous layer of powder when printing; acquiring an image to be printed corresponding to a current layer to be printed; and identifying the image to be printed, judging whether the image to be printed has a preset mark, if so, processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder laying action of the current layer to be printed. The invention can avoid the phenomenon of belt pushing displacement to a certain extent in the using process, and is beneficial to improving the printing efficiency and the quality of printed products.

Description

3DP powder printing method, device and system and storage medium
Technical Field
The embodiment of the invention relates to the technical field of 3D printing, in particular to a 3DP powder printing method, a device and a system and a computer readable storage medium.
Background
The 3DP powder printing technique is to lay powder materials layer by layer into powder layers, and then selectively apply adhesive to local parts to bond and solidify the corresponding parts of the powder layers to fabricate the component. When each layer is printed, a layer of powder is uniformly paved, then a layer of adhesive is sprayed on the area to be formed, the adhesive has small droplets and is not easy to diffuse, the powder and the adhesive can be subjected to chemical reaction and quickly cured when in contact, and the area without the adhesive is kept in a loose state. The parts are printed and molded by alternately superposing a layer of powder and a layer of adhesive, and only loose powder needs to be swept away after printing.
In the 3DP powder printing technology, in order to break through high efficiency printing, the area of the powder layer sprayed with the adhesive is as high as 2200mm × 1800mm, the speed of the powder spreader is as high as 300 + 330mm/s, and when the first layer of powder is not completely cured after reacting with the adhesive due to the high speed of the powder spreader in the printing process, the powder layer with the large area of the first layer of sprayed adhesive is pushed to displace when the powder spreader spreads the second layer of powder, which seriously affects the printing quality of the final product, for example, in the component printing model shown in fig. 1, when the 2 nd and 15 th layers of powder are spread, the powder layers of the 1 st and 14 th layers of sprayed adhesive are pushed to displace, and the phenomenon of powder layer pushing displacement occurs. Experiments show that after the powder layer is sprayed with the adhesive, the powder layer waits for half a minute to prolong the curing time of the powder and the adhesive by half a minute, and then the second layer of powder is paved, so that the powder pushing phenomenon does not exist, the first layer is usually manually paused in actual printing, and the work box needs to be manually stopped and started after printing one layer; and the middle layer can only print the model with smaller area difference product of the adjacent layers, so the printing requirement greatly limits the flexibility of the equipment and the space utilization rate of the working box, and the printing efficiency is greatly influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a 3DP powder printing method, a device, a system and a computer readable storage medium, which can avoid the phenomenon of tape pushing displacement to a certain extent in the using process and are beneficial to improving the printing efficiency and the quality of printed products.
In order to solve the above technical problem, an embodiment of the present invention provides a 3DP powder printing method, including:
analyzing each layer of printing image corresponding to a component to be printed in advance to determine a target printing image, and adding a preset mark to the target printing image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape pushing displacement of a previous layer of powder layer during printing;
acquiring an image to be printed corresponding to a current layer to be printed;
and identifying the image to be printed, judging whether the image to be printed has the preset mark, if so, processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder paving action of the current layer to be printed.
Optionally, the process of analyzing each layer of the print image corresponding to the component to be printed in advance to determine the target print image, and adding the preset mark to the target print image is as follows:
carrying out differential product processing on the areas of the spraying agent in every two adjacent layers of printing images in each layer of printing images corresponding to the member to be printed, and calculating the area of a differential product image of the spraying agent area in the (n + 1) th layer of printing images and the spraying agent area of the nth layer of printing images; where N is 1,2,3 … N, N being the total number of printed images;
and judging whether the area of the difference product image is larger than a preset value or not, if so, taking the (n + 1) th layer of printing image as a target printing image, and adding a preset mark to the (n + 1) th layer of printing image.
Optionally, the process of processing the current layer to be printed and/or the previous powder layer on the current layer to be printed is as follows:
reducing the powder spreading speed of the powder spreader to the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
Optionally, the process of processing the current layer to be printed and/or the previous powder layer on the current layer to be printed is as follows:
controlling a powder spreader to pause for a preset time and then spreading the powder on the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
Optionally, the process of performing curing treatment on the previous powder layer located on the current layer to be printed includes:
and applying a catalyst to the previous powder layer positioned on the current layer to be printed so as to solidify the previous powder layer.
The embodiment of the invention also correspondingly provides a 3DP powder printing device, which comprises:
the adding module is used for analyzing each layer of printing image corresponding to the component to be printed in advance, determining a target printing image and adding a preset mark to the target printing image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape pushing displacement of a previous layer of powder layer during printing;
the acquisition module is used for acquiring an image to be printed corresponding to the current layer to be printed;
the identification module is used for identifying the image to be printed, judging whether the image to be printed has the preset mark or not, and if so, triggering the processing module;
the processing module is used for processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder spreading action of the current layer to be printed.
Optionally, the adding module includes:
the processing unit is used for carrying out difference product processing on the areas of the spraying agents in every two adjacent layers of images to be printed in each layer of printed images corresponding to the members to be printed, and calculating the difference product image area of the spraying agent area in the (n + 1) th layer of printed images and the spraying agent area of the nth layer of printed images; where N is 1,2,3 … N, N being the total number of printed images
The judging unit is used for judging whether the area of the difference product image is larger than a preset value or not, and if so, the adding unit is triggered;
the adding unit is used for taking the n +1 th layer printing image as a target printing image and adding a preset mark to the n +1 th layer printing image.
Optionally, the processing module includes:
the suspension unit is used for controlling the powder spreader to suspend for a preset time length and then spreading the powder on the current layer to be printed;
and/or the curing unit is used for curing the previous powder layer on the current layer to be printed.
An embodiment of the present invention further provides a 3DP powder printing system, including:
a memory for storing a computer program;
a processor for implementing the steps of the 3DP powder printing method as described above when executing the computer program.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the 3DP powder printing method as described above.
The embodiment of the invention provides a 3DP powder printing method, a device, a system and a computer readable storage medium, which can determine target printing images needing to be added with preset marks by analyzing printing images of all layers corresponding to a component to be printed in advance, and add the preset marks to the target printing images, wherein the target printing images comprise printing images corresponding to target layers which can cause the tape pushing displacement of the previous layer of powder layer during printing; when printing according to each layer of printing image, the printing image corresponding to the current printing layer is identified through identification, and when the preset mark exists in the printing image of the current printing layer pair, the current printing layer and/or the previous layer of powder layer positioned on the current printing layer is processed, so that the previous layer of powder layer does not move along with the powder spreading action of the current printing layer, the phenomenon of tape pushing displacement is avoided to a certain extent, and the printing efficiency and the quality of the printed product are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a printing model of a conventional component;
FIG. 2 is a schematic flow chart of a 3DP powder printing method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the region of the spray agent for the n +1 layer of the printed image and the n-th layer of the printed image according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a difference product image corresponding to FIG. 3;
fig. 5 is a schematic structural diagram of a 3DP powder printing apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a 3DP powder printing method, a device and a system and a computer readable storage medium, which can avoid the phenomenon of tape pushing displacement to a certain extent in the using process and are beneficial to improving the printing efficiency and the quality of printed products.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic flow chart of a 3DP powder printing method according to an embodiment of the present invention. The method comprises the following steps:
s110: analyzing each layer of printing image corresponding to the component to be printed in advance to determine a target printing image, and adding a preset mark to the target printing image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape-pushing displacement of the previous layer of powder when printing;
it should be noted that each member to be printed corresponds to a respective multilayer print image, and when the member to be printed is printed, each layer of print image is read in sequence to print the corresponding layer. In this application, each layer of printing image that corresponds respectively with every component of waiting to print carries out the analysis in advance, determine the target layer that can make the one deck take place to push away the tape displacement phenomenon when printing from it, and regard the printing image that corresponds with this layer as the target printing image, this target layer needs carry out special treatment when printing the component, so that prevent that the one deck from sending and pushing away the tape displacement phenomenon when printing this layer, so in this application after determining the target printing image, add preset mark (this preset mark is 1 for example) to the target printing image, so that print the messenger according to the component of waiting to print of each layer printing image, can discern which layer can make the one deck send and push away the tape displacement phenomenon when printing, then carry out corresponding processing when printing this layer. Step S110 in this embodiment is only required to be executed once before the member to be printed is printed.
Specifically, in the step S110, the process of analyzing each layer of the print image corresponding to the to-be-printed member in advance to determine the target print image, and adding the preset mark to the target print image may specifically be:
carrying out differential product processing on the areas of the spraying agent in every two adjacent layers of printing images in each layer of printing images corresponding to the member to be printed, and calculating the area of a differential product image of the spraying agent area in the (n + 1) th layer of printing images and the spraying agent area of the nth layer of printing images; where N is 1,2,3 … N, N being the total number of printed images;
and judging whether the area of the difference product image is larger than a preset value or not, if so, taking the (n + 1) th layer of printing image as a target printing image, and adding a preset mark to the (n + 1) th layer of printing image.
It should be noted that the area of the sprayed adhesive in the printed image refers to the area corresponding to the adhesive area of the printed image where the adhesive needs to be sprayed, that is, the adhesive is sprayed on the sprayed adhesive area in the actual printing.
Specifically, the area of the spray agent receiving area in the n +1 th layer of the print image and the area of the spray agent receiving area in the n th layer of the print image are shown in fig. 3, in the present application, the area of the difference product image between the area of the spray agent receiving area in the n +1 th layer of the print image and the area of the spray agent receiving area in the n th layer of the print image can be calculated (as shown in fig. 4), and whether the area of the difference product image is larger than a preset value (the preset value is, for example, 0.5 square meter) is judged, when the area of the difference product image is larger than the preset value, it is described that the tape pushing displacement phenomenon occurs in the n th layer of the powder layer when the n +1 th layer is printed, and then a preset mark is added to the n +1 th layer of the print image. And polling from the first image larger than the image until the N-1 layer printing image and the N layer printing image are processed, and finishing. And adding preset marks to the corresponding target printing images for each component to be printed according to the mode.
S120: acquiring an image to be printed corresponding to a current layer to be printed;
specifically, when the component is printed, the corresponding printing images of each layer are sequentially read, and the corresponding printing is performed on the layer according to the printing requirement, wherein when the current layer to be printed is printed, the image to be printed corresponding to the current layer to be printed can be read from the prestored multilayer printing images corresponding to the printing component. S130: identifying the image to be printed, judging whether the image to be printed has a preset mark, if so, entering S140;
after the image to be printed corresponding to the current layer to be printed is obtained, performing mark recognition on the image to be printed to determine whether a preset mark is added to the image to be printed, and when the preset mark exists in the image to be printed, indicating that the phenomenon of tape pushing displacement of the previous layer can occur when the layer is printed according to a conventional mode, so that step S140 needs to be executed at this time, so that the previous layer does not move along with the powder spreading action of the current layer to be printed when the current layer to be printed is printed after corresponding processing is performed. In addition, if the preset mark does not exist in the image to be printed, the phenomenon that the belt pushing displacement of the previous layer is not caused when the current layer to be printed is printed according to a conventional method is explained, so that the current layer to be printed can be printed according to a conventional method (for example, the powder spreading speed is not lower than 300 mm/s).
S140: and processing the current layer to be printed and/or the previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder laying action of the current layer to be printed.
Specifically, when a preset mark exists in an image to be printed corresponding to a current layer to be printed, the current layer to be printed and/or a previous layer of powder layer located on the current layer to be printed can be processed, so that the previous layer of powder layer does not move along with the powder spreading action of the current layer to be printed, then the current layer to be printed is printed, after the current layer to be printed is printed, a printed image corresponding to a next layer to be printed can be continuously obtained, whether the preset mark exists or not is judged, if the preset mark exists, the processing is continuously performed according to the method in the application, and if the preset mark does not exist, the corresponding printed layer is printed according to a conventional method.
Further, in the step S140, the process of processing the current layer to be printed and/or the previous powder layer on the current layer to be printed may specifically be:
reducing the powder spreading speed of the powder spreader to the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
It should be noted that, the powder spreading speed may be reduced by controlling the powder spreader, for example, the powder spreading printing is performed on the current layer to be printed at a speed lower than 300mm/s, so as to reduce the impact of the current layer to be printed on the previous powder layer, so that the previous powder layer does not move along with the powder spreading action of the current layer to be printed. In addition, the previous powder layer can be solidified, for example, by applying a catalyst to the previous powder layer, the previous powder layer is solidified quickly, so that the strength of the previous powder layer can reach the strength capable of resisting the powder spreading impact of the current layer to be printed. Of course, the powder spreading speed of the powder spreader can be reduced, and meanwhile the previous layer of powder layer is solidified, which specific mode is adopted can be determined according to actual needs, and the application is not specially limited.
It should be further noted that, in the above step S140, the process of processing the current layer to be printed and/or the previous powder layer located on the current layer to be printed may further be:
controlling a powder paving device to pause for a preset time length and then paving the powder on the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
That is, the powder spreader may be controlled to pause for a preset time (e.g., 1min) so that the previous powder layer has a time long enough to solidify to a strength that can resist the impact of the powder spread of the current layer to be printed. In addition, in order to shorten the time of pause, the powder spreader can be paused and the previous powder layer can be solidified, so that the printing efficiency is improved under the condition that the previous powder layer does not move along with the powder spreading action of the current layer to be printed.
Specifically, the process of performing the curing treatment on the previous powder layer located on the current layer to be printed specifically includes:
and applying a catalyst to the previous powder layer positioned on the current layer to be printed so as to solidify the previous powder layer.
Of course, besides applying the catalyst, the curing treatment of the previous powder layer may be implemented by other means, for example, by heating or cooling, and the specific manner may be determined according to actual needs.
Therefore, after each layer of printing images corresponding to the component to be printed is analyzed in advance, target printing images needing to be added with preset marks are determined, the preset marks are added to the target printing images, and the target printing images comprise printing images corresponding to target layers, wherein the previous layer of powder layer can generate tape pushing displacement during printing; when printing according to each layer of printing image, the printing image corresponding to the current printing layer is identified through identification, and when the preset mark exists in the printing image of the current printing layer pair, the current printing layer and/or the previous layer of powder layer positioned on the current printing layer is processed, so that the previous layer of powder layer does not move along with the powder spreading action of the current printing layer, the phenomenon of tape pushing displacement is avoided to a certain extent, and the printing efficiency and the quality of the printed product are improved.
In addition, the printing method provided by the application does not need to limit the area of the spraying agent joint of the middle layer of the component to be printed, namely, the method can be used for printing a model with a large area of the spraying agent joint of the middle layer, and the application range is expanded.
On the basis of the above embodiments, the embodiment of the present invention further provides a 3DP powder printing apparatus, specifically referring to fig. 5. The device includes:
the adding module 21 is used for analyzing each layer of printing image corresponding to the component to be printed in advance, determining a target printing image and adding a preset mark to the target printing image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape-pushing displacement of the previous layer of powder when printing;
an obtaining module 22, configured to obtain an image to be printed corresponding to a current layer to be printed;
the recognition module 23 is configured to recognize an image to be printed, determine whether the image to be printed has a preset mark, and trigger the processing module if the image to be printed has the preset mark;
and the processing module 24 is configured to process the current layer to be printed and/or a previous powder layer located on the current layer to be printed, so that the previous powder layer does not move along with the powder spreading action of the current layer to be printed.
Optionally, the adding module 21 includes:
the processing unit is used for carrying out difference product processing on the areas of the spraying agents in every two adjacent layers of images to be printed in each layer of printed images corresponding to the members to be printed, and calculating the difference product image area of the spraying agent area in the (n + 1) th layer of printed images and the spraying agent area of the nth layer of printed images; where N is 1,2,3 … N, N being the total number of printed images
The judging unit is used for judging whether the area of the difference product image is larger than a preset value or not, and if so, the adding unit is triggered;
an adding unit configured to take the n +1 th layer print image as a target print image and add a preset mark to the n +1 th layer print image.
Optionally, the processing module 24 includes:
the suspension unit is used for controlling the powder spreader to suspend for a preset time length and then spreading the powder on the current layer to be printed;
and/or the curing unit is used for curing the previous powder layer on the current layer to be printed.
It should be noted that the 3DP powder printing apparatus provided in this embodiment has the same beneficial effects as the 3DP powder printing method provided in the foregoing embodiment, and for the specific description of the 3DP powder printing method provided in this embodiment, please refer to the foregoing embodiment, which is not described herein again.
On the basis of the above embodiments, the present invention further provides a 3DP powder printing system, including:
a memory for storing a computer program;
a processor for implementing the steps of the above-described 3DP powder printing method when executing a computer program.
For example, the processor in this embodiment is configured to analyze each layer of a print image corresponding to a component to be printed in advance, determine a target print image, and add a preset mark to the target print image; the target printing image comprises a printing image corresponding to a target layer which can cause the tape-pushing displacement of the previous layer of powder when printing; acquiring an image to be printed corresponding to a current layer to be printed; and identifying the image to be printed, judging whether the image to be printed has a preset mark, if so, processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder laying action of the current layer to be printed.
On the basis of the above embodiments, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the above-described 3DP powder printing method.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method of 3DP powder printing, comprising:
analyzing each layer of printing image corresponding to a component to be printed in advance to determine a target printing image, and adding a preset mark to the target printing image; the target printing image is a printing image corresponding to a target layer which can cause the tape pushing displacement of the previous layer of powder when printing;
acquiring an image to be printed corresponding to a current layer to be printed;
and identifying the image to be printed, judging whether the image to be printed has the preset mark, if so, processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder paving action of the current layer to be printed.
2. The 3DP powder printing method according to claim 1, wherein said analyzing in advance the printed images of the layers corresponding to the member to be printed to determine the target printed image and adding the preset mark to the target printed image is:
carrying out differential product processing on the areas of the spraying agent in every two adjacent layers of printing images in each layer of printing images corresponding to the member to be printed, and calculating the area of a differential product image of the spraying agent area in the (n + 1) th layer of printing images and the spraying agent area of the nth layer of printing images; where N =1,2,3 … N, N being the total number of printed images;
and judging whether the area of the difference product image is larger than a preset value or not, if so, taking the (n + 1) th layer of printing image as a target printing image, and adding a preset mark to the (n + 1) th layer of printing image.
3. The 3DP powder printing method according to claim 1, wherein said processing of said current layer to be printed and/or a layer of powder on a layer to be printed next to said current layer to be printed is:
reducing the powder spreading speed of the powder spreader to the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
4. The 3DP powder printing method according to claim 1, wherein said processing of said current layer to be printed and/or a layer of powder on a layer to be printed next to said current layer to be printed is:
controlling a powder spreader to pause for a preset time and then spreading the powder on the current layer to be printed;
and/or carrying out solidification treatment on the previous powder layer positioned on the current layer to be printed.
5. A3 DP powder printing method according to claim 3 or 4, wherein the process of solidifying the layer of powder immediately above the current layer to be printed is:
and applying a catalyst to the previous powder layer positioned on the current layer to be printed so as to solidify the previous powder layer.
6. A 3DP powder printing apparatus, comprising:
the adding module is used for analyzing each layer of printing image corresponding to the component to be printed in advance, determining a target printing image and adding a preset mark to the target printing image; the target printing image is a printing image corresponding to a target layer which can cause the tape pushing displacement of the previous layer of powder when printing;
the acquisition module is used for acquiring an image to be printed corresponding to the current layer to be printed;
the identification module is used for identifying the image to be printed, judging whether the image to be printed has the preset mark or not, and if so, triggering the processing module;
the processing module is used for processing the current layer to be printed and/or a previous layer of powder layer positioned on the current layer to be printed so as to prevent the previous layer of powder layer from moving along with the powder spreading action of the current layer to be printed.
7. The 3DP powder printing device of claim 6, wherein the add module comprises:
the processing unit is used for carrying out difference product processing on the areas of the spraying agents in every two adjacent layers of images to be printed in each layer of printed images corresponding to the members to be printed, and calculating the difference product image area of the spraying agent area in the (n + 1) th layer of printed images and the spraying agent area of the nth layer of printed images; where N =1,2,3 … N, N being the total number of printed images
The judging unit is used for judging whether the area of the difference product image is larger than a preset value or not, and if so, the adding unit is triggered;
the adding unit is used for taking the n +1 th layer printing image as a target printing image and adding a preset mark to the n +1 th layer printing image.
8. The 3DP powder printing apparatus of claim 6, wherein the processing module comprises:
the suspension unit is used for controlling the powder spreader to suspend for a preset time length and then spreading the powder on the current layer to be printed;
and/or the curing unit is used for curing the previous powder layer on the current layer to be printed.
9. A 3DP powder printing system, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the 3DP powder printing method of any one of claims 1 to 5 when said computer program is executed.
10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the 3DP powder printing method of any one of claims 1 to 5.
CN201910568261.6A 2019-06-27 2019-06-27 3DP powder printing method, device and system and storage medium Active CN112140551B (en)

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KR1020217041505A KR102569187B1 (en) 2019-06-27 2020-06-22 3DP powder printing method, device, system and storage medium
JP2021527040A JP7161834B2 (en) 2019-06-27 2020-06-22 3DP POWDER PRINTING METHOD, APPARATUS, SYSTEM AND STORAGE MEDIUM
PCT/CN2020/097337 WO2020259425A1 (en) 2019-06-27 2020-06-22 3dp powder printing method, device and system, and storage medium
EP20832610.8A EP3991951B1 (en) 2019-06-27 2020-06-22 3dp powder printing method
US17/555,481 US11919247B2 (en) 2019-06-27 2021-12-19 Powder-based three-dimensional printing (3DP) method, device and system, and computer-readable storage medium

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